Device for sharpening plow-colters



(No Model.)

- V. A. MAYBERRY.

DBVIGE FOR SHARPENING PLOW "COLTEES.

Patented Sept. 18, 1883.

/MQTIVESSES .2 &MM;

N. PETERS. Fhnto-Llbognpler. washin ton. n.c,

UNITED ,STATES PATENT OFFICE.

VICTOR A. MAYBERRY, OF LA GRANGE, MISSOURI.

DEVICE FOR SHARPENING PLOW COLTERS.

SPECIFICATION forming part of Letters Patent No. 285,287, datedSeptember 18, 1883.

/ Application filed June 26,1883. (No model.)

To all whom, it may cortcern:

Be it known that I, VICTOR A. MAYBERRY, a citizen of the United States,residing at La Grange, in the county of Lewis and State of .Missouri,have invented a new and useful Deprovide a simple. inexpensive durable,and r efficient device that is adapted to be attached to the frame ofthe colter, so that it will be automatically sharpened as the plow isdriven.

In the drawings, Figure 1 is a perspective view, showing my devicesecured in position for operation. Fig. 2 is a top View of the same.Fig. 3 is a vertical sectional view taken through the wings of thesharpening device. Fig. 4 is a horizontal sectional View taken throughthe piece that connects the wings to the main frane.

Referring to the drawings, A designates an arch-piece, that forms themain portion of the frainevof my device, and is provided withlongitudinal slots B B in its side pieces and with suitable clanps, C C,at its lower ends, by which it can be readily clanped in position on theframe of the colter, so that it will straddle the latter.

D D designate connecting-blocks, that have end flanges or shoulders, EE, and are secured-one to each side of frame A-by means of bolts F F,passing through slots B B, and by adjusting these bolts in the slots thesaid pieces can be adjusted vertically on frame A to change the inclineof the sharpening-'files that are secured to the wings, the latter beingbolted, as at G, or otherwise secured to the front ends of the blocks DD. These wings each comprise a main arm, H, to the bottom end of whichis pivoted, as at I, a swinging arm, J, having au inwardly-proj ectingfiange, L, at its bottom, and having a plate, M, secured over its topend. In this fiange L is provided a socket, N, for the lower end of thefile O, while the other end of the latter passes through a correspondingperforaton, P, in the projecting renovable plate M, as shown. The fileis preferably a three-edged one, and the socketsN and P are therefore oftriangular shape, so that the file can be turned, to use all of itssides. The files are also adapted to be reversed vertically, so thattheir entire surface can be utilized.

From the top ends of arms J eXtend outwardly projecting rods Q, that arep'referably bowed, and pass through a slot, R, in the main fixed arm H.y A coiled spring, S, is arranged around the rod Q, which will becompressed against the arin H when the arm J is forced outward by anybend or inperfection in the periphery of the colter, and will serve toreturn the arm J to its normal position when the bend has passed.

The operation and advantages of 1nyinvention will be readily understood.The files will be continually in contact with the edge of the colter,and will sharpen the same as it revolves, and, when desired, thesharpening de- Vce can be removed by simply Operating itssecuring-clamps. 4

I claim as my invention- 1. The combination, with the frame carryi ingthe rotary colter, of a device secured to the frane and engaging theedgeof the colter to sharpen it as the plow is driven, substantially asand for the purpose set forth.

2. The combination, with the frame of the sharpener, adapted to besecured to the frame of the colter, of wings secured to this frame andcarrying files arranged to engage the edge of the colter as it revolves,substantially as and for the purpose set forth.

3. In a device for sharpening plow-colte's, the combination of a frameby which it may be secured in position, pivoted inclined arms carryingfiles adapted to engage the edge of the colter, and spring nechanisn forforcing these arms into engagement with the colter, substantially as andfor the purpose set forth.

4. The conbination of the arched main frame having the longitudinal sideslots, the securing-blocks,having bolts working in the said slots, thewings secured to these blocks ,and comprising a fixed arm and an armpiv- VICTOR A. MAYBERRY.

NVitnesses WINTHROP H. SUDDUTH, Lnws W. HARDMAN. y

